Cisco 3845 - Security Bundle Router Software Manual page 347

Chapter 17 Configuring Flex Links and the MAC Address-Table Move Update Feature
Command
Step 5
show interface [interface-id] switchport backup
Step 6
copy running-config startup config
This example shows how to configure an interface with a backup interface and to verify the
configuration:
Switch# configure terminal
Switch(conf)# interface gigabitethernet0/1
Switch(conf-if)# switchport backup interface gigabitethernet0/2
Switch(conf-if)# end
Switch# show interface switchport backup
Switch Backup Interface Pairs:
Active Interface
------------------------------------------------------------------------------------------
GigabitEthernet0/1
GigabitEthernet0/3
Port-channel1
Beginning in privileged EXEC mode, follow these steps to configure a preemption scheme for a pair of
Flex Links:
Command
Step 1
configure terminal
Step 2
interface interface-id
Step 3
switchport backup interface interface-id
Step 4
switchport backup interface interface-id preemption
mode {forced | bandwidth | off}
Step 5
switchport backup interface interface-id preemption
delay delay-time
Step 6 end
Step 7 show interface [interface-id] switchport backup
Step 8 copy running-config startup config
OL-23400-01
Configuring Flex Links and MAC Address-Table Move Update
Purpose
Verify the configuration.
(Optional) Save your entries in the switch startup
configuration file.
Backup Interface
GigabitEthernet0/2
GigabitEthernet0/4
GigabitEthernet0/1
Purpose
Enter global configuration mode.
Specify the interface, and enter interface configuration
mode. The interface can be a physical Layer 2 interface or
a port channel (logical interface). The port-channel range
is 1 to 26.
Configure a physical Layer 2 interface (or port channel)
as part of a Flex Link pair with the interface. When one
link is forwarding traffic, the other interface is in standby
mode.
Configure a preemption mechanism and delay for a Flex
Link interface pair. You can configure the preemption as:
forced—the active interface always preempts the
•
backup.
• bandwidth—the interface with the higher bandwidth
always acts as the active interface.
• off—no preemption happens from active to backup.
Configure the time delay until a port preempts another
port.
Note
Return to privileged EXEC mode.
Verify the configuration.
(Optional) Save your entries in the switch startup
configuration file.
Cisco ME 3800X and 3600X Switch Software Configuration Guide
State
Active Up/Backup Standby
Active Up/Backup Standby
Active Up/Backup Standby
Setting a delay time only works with forced and
bandwidth modes.
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